Connecting metal nut



1. Connecting metal nut

Ornamental design for a connecting metal nut of which the following is a specification, reference being made to the accompanying drawings, forming part thereof.

1.1 is a perspective view:

1.2 is a side view;

1.3 is a front view; and

1.4 is a rear view. 

CLAIM The ornamental design for a connecting metal nut, as shown and described. 